To me it seems like less of a war on general computing and more like Apple is hoping to prevent mixed reality or "spatial computing" from becoming an extension on the privacy disaster that smartphones became.
This seems prudent, because as personal as smartphones are, a headset like the Vision Pro dials that up tenfold. Considering what third parties have done with just the information surfaced in mobile operating systems, or heck even the web, I shudder to think of what they'd do with gaze data and a high fidelity color 3D map of your surroundings.
If there's a way to accomplish this without opening headset users into being easily socially engineered into figuratively selling the farm, sure.
In this particular case I think perhaps a better approach would be to allow apps to bypass App Store restrictions so long as their source code is public and binaries match that code. This would naturally deter those with shady intentions, allow FOSS projects to thrive, allow both manual and automated third party vetting of apps, and help users better know what they're getting into.
This seems prudent, because as personal as smartphones are, a headset like the Vision Pro dials that up tenfold. Considering what third parties have done with just the information surfaced in mobile operating systems, or heck even the web, I shudder to think of what they'd do with gaze data and a high fidelity color 3D map of your surroundings.